Meta Platforms Technologies, LLC

Umanath Ramachandra Kamath

Ali Mesgarani

Augusto Ronchini Ximenes

Robert F Wiser

This disclosure describes a method of operating an image sensor and a plurality of memory cells associated with the image sensor, each memory cell comprising: one or more input lines, a stop exposure output line; a storage capacitor; and a stop exposure circuit. The method may comprise, by each of the memory cells, sensing a voltage representing an exposure event in response to the input lines being enabled, and by a first one of the memory cells, enabling the stop exposure output line in response to a charge on the storage capacitor satisfying a charge threshold; and stopping further exposure of the image sensor in response to the stop exposure output line being enabled for the first one of the memory cells.

Automatic termination of image sensor for analog histogram depth sensing

A method may be performed by a leakage monitoring and compensation system configured to estimate and compensate for leakage current in memory unit cells. The method may include identifying a leakage monitoring component associated with a memory unit cell. Further, the method may include sampling multiple leak events during a first exposure window. The method may include storing a first count representing the plurality of leak events sampled during the first exposure window. Each leak event may correspond to a unit of memory leakage. The method may include sampling multiple sensing events during a second exposure window. The method may include detecting a second count representing the sensing events sampled during the second exposure window. The method may include determining a compensation value representing a difference between the first count and the second count.

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Palo Alto, CA, United States of America

Umanath Ramachandra Kamath